Nobelium definition of Nobelium in the Free Online Encyclopedia.

nobelium (nōbē`lēəm), artificially produced radioactive chemical element; symbol No; at. no. 102; mass no. of most stable isotope 259; m.p. 827°C;; b.p. and density unknown; valence +2, +3. It is a metal of the actinide series actinide series, a series of radioactive metallic elements in Group 3 of the periodic table. Members of the series are often called actinides, although actinium (at. no. 89) is not always considered a member of the series.
..... Click the link for more information. in Group 3 of the periodic table periodic table, chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table
..... Click the link for more information. . Nobelium was the 10th transuranium element transuranium elements, in chemistry, radioactive elements with atomic numbers greater than that of uranium (at. no. 92). All the transuranium elements of the actinide series were discovered as synthetic radioactive isotopes at the Univ.
..... Click the link for more information. to be discovered. It was first produced and detected in Apr., 1958, by Albert Ghiorso, Torbjørn Sikkeland, John R. Walton, and Glenn T. Seaborg Seaborg, Glenn Theodore , 1912–99, American chemist, b. Ishpeming, Mich., grad. Univ. of California at Los Angeles, 1934, Ph.D. Univ. of California at Berkeley, 1937.
..... Click the link for more information. at the Univ. of California at Berkeley; they used a heavy-ion linear accelerator to bombard a mixture of curium-244 and curium-246 with carbon-12 ions, producing nobelium-254 (half-life half-life, measure of the average lifetime of a radioactive substance (see radioactivity) or an unstable subatomic particle. One half-life is the time required for one half of any given quantity of the substance to decay.
..... Click the link for more information. 55 sec). The name of the element was originally suggested by scientists at the Nobel Institute of Physics, who in 1957 reported synthesis of an isotope of the element; although the name was adopted, it was later shown that the element could not have the properties they reported. Thirteen isotopes, all of which are radioactive, are known; the most stable, nobelium-259, has a 58-min half-life.

nobelium

a transuranic element produced artificially from curium. Symbol: No; atomic no.: 102; half-life of most stable isotope, ²⁵⁵No: 180 seconds (approx.); valency: 2 or 3

nobelium [nō′bel·ē·əm]

(chemistry)

A chemical element, symbol No, atomic number 102; a synthetic element, in the actinium series; isotopes with mass numbers 250-260 and 262 have been produced in the laboratory, with mass number 259 having the longest known half-life, 58 minutes.

Nobelium

No (element 102), an artificially produced radioactive chemical element of the actinide family, with atomic number 102.

The preparation of atoms of element 102 was first announced in 1957 by an international group of scientists working in Stockholm, Sweden, that also proposed that the element be named in honor of A. Nobel, the founder of a fund for international prizes (Nobel Prizes). However, subsequent experiments conducted at Berkeley (USA) and the Joint Institute for Atomic Studies (Dubna, USSR) showed that the conclusion of the Stockholm group was erroneous.

The first reliable information on isotopes of element 102 with mass numbers 251–256 was obtained during the period from 1963 to 1967 by a group of Soviet physicists at Dubna, headed by G. N. Flerov. For the synthesis of these isotopes the Soviet group irradiated nuclei of isotopes of uranium, plutonium, and americium with accelerated ions of neon, oxygen, and nitrogen. The results of the Dubna group have been fully confirmed. The Soviet scientists have proposed naming element 102 joliotium (symbol Jl) in honor of Jean Frédéric Joliot-Curie. As yet there is no commonly accepted name for element 102.

As of 1974, isotopes of nobelium with mass numbers from 251 to 259 had been obtained in microscopic quantities. The most long-lived isotope, ²⁵⁹102 (half-life, about 1.5 hr), was synthesized in 1970 at Oak Ridge (USA). The first chemical identification of element 102 was carried out by a group of Flerov’s colleagues using a technique developed for studying kurcha-tovium. The volatility of the chloride of element 102 is similar to that of the chlorides of fermium and californium. The most stable oxidation state of nobelium in solution is + 2; it may pass into an oxidation state of + 3 under the action of strong oxidizing agents.

Mentioned in	?		References in periodicals archive	?		Encyclopedia browser	?		Full browser	?
No references found			The topics range from the basic science and research on the actinide series--those 14 chemical elements lying between actinium and nobelium, inclusively, and representing the atomic numbers 89-102 (this group includes such radioactive elements as uranium and plutonium)--to their nuclear and superconducting applications. Recent advances in actinide science by SciTech Book News IUPAC's recommended element names revealed Atomic Voting number Name Symbol in favor(a) 101 Mendelevium Md 20 102 Nobelium No 20 103 Lawrencium Lr 20 104 Dubnium Db 19 105 Joliotium Jl 18 106 Rutherfordium Rf 18 107 Bohrium Bh 20 108 Hahnium Hn 19 109 Meitnerium Mt 20 (a)Voters were the 20 members of the International Union of Pure & Applied Chemistry's Commission on Nomenclature of Inorganic Chemistry. Elemental upset by Science News The scientists checked the element's presence by measuring alpha particle emissions as it decayed to form the "daughter" and "granddaughter" elements rutherfordium and nobelium. Element 106 takes the name seaborgium by Lipkin, Richard / Science News			no-trump no-wind heading no-wind position no-write allocation No. 6 fuel Noah Noah's altar Noah's Ark Noah, Mordecai Manuel noaide Noailles, Adrien Maurice, duc de Noailles, Anna Élisabeth de Brancovan, comtesse de Noailles, Louis Marie Antoine, vicomte de Noam Chomsky Noatak National Preserve nob Nobah nobble Nobel Nobel Memorial Prize in Economic Sciences Nobel Prize Nobel Prize Ceremony Nobel Prizes Nobel, Alfred Nobel, Alfred Bernhard Nobelium Nobeoka Nobi Nobile, Umberto Nobili, Roberto de Nobilitas Nobility Nobility, Assembly of the Nobility, Bank of the Nobility, Institutes of the noble Noble County noble gas noble metal Noble Metals noble potential Noble Savage Noble, Thomas Satterwhite noble-gas electron configuration Noblemindedness Nobles County Nobosuke Kishi Nobunaga NOC Nocard, Edmond Nocardiaceae			Nobel prize Nobel prize Nobel prize Nobel prize Nobel prize Nobel Prize Ceremony Nobel Prize in Economics Nobel Prize in Physiology or Medicine Nobel Prize laureate Nobel Prize laureate Nobel Prize laureate Nobel Prize laureate Nobel Prizes Nobel Prizes Nobel Prizes Nobel Prizes Nobel's Will Nobel's Will Nobel's Will Nobel's Will Nobel, Alfred Nobel, Alfred Bernhard Nobel, Alfred Bernhard Nobel, Alfred Bernhard Nobelist Nobelist Nobelist Nobelist Nobelists Nobelists Nobelium Nobelprize Nobelprize Nobelprize Nobelprize Nobelprize.org Nobelprize.org Nobelprize.org Nobelprize.org Nobeoka Nobeoka, Miyazaki Nobert's lines Nobeyama Millimeter Array Nobeyama radio observatory NOBF NOBG NOBHA Nobi Nobi NOBIC NOBID Nobile Nobile Nobile, Umberto Nobiles Nobiles Nobili Loco Natus Nobili's rings Nobili, Roberto de nobiliary nobiliary particle

Nobelium playV2('en/US/d7/d7dnskdfdtskdns5sfgk');playV2('en/UK/d7/d7dnskdfdtskdns5sfgk')

Nobelium